i think if they have the time this is something that will add more fun to the game. Units will react or say different things depending on what they are ask to do or condition which are different from their normal command move lines/quotes.

i bet blizzard has never thought of this idea. but this is something very easy to do if they still have the time.

or maybe it was for the campaign. i think in single player blizzard will add many unique unit lines just like in sc1.

but my idea is also for the multiplayer ad make it fix, so as to every time you command a marine/s to get inside a bunker, he will say "to the bunker! " or "take cover!". instead of the normal lines like "gogogo".

That reminds me of the first video, if you selected a group of zealots, theyll say "We stand as one," but selecting one will get you "I - " or "command me."
So,... I guess theyre already doing it, atleast for selecting more than one unit. And if it was just luck, then Im sure theyve atleast thought of the idea.

They may infact do this since Blizzard is now all about lathering on as much high quality content as possible. I don't see why it would take a long time since these are just extra lines the voice actor has to read